Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b63fb87a9e719ee…

MALICIOUS

PDF

66.2 KB Created: 2020-11-23 08:49:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 711a3783e9418e7ff53686f72ca83c2e SHA-1: 9af050fd0aae717567b77eaded16773d1a32a775 SHA-256: 2b63fb87a9e719eee65eefbe872eed7dafecb247292969c2c7e4064ebbaaadb6
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature. Although no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing page or a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/aws?utm_term=deep+breathing+exercise+adalah+pdf In PDF document text
    • https://lokowukaf.weebly.com/uploads/1/3/4/3/134315315/wubofavovepa-boxuw-wuwevavobewo-tiloxufebalatu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f9eaf6b49ffc.pdfIn PDF document text
    • https://tebixuku.weebly.com/uploads/1/3/4/5/134595315/lejulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406481/normal_5f949ef43b71e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387826/normal_5f9f9d111ae61.pdfIn PDF document text
    • https://zimiduninu.weebly.com/uploads/1/3/1/6/131637103/3739262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383471/normal_5faa56d1675d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d63dc270-70b1-4b82-bb25-e29c2acdf51a/juwiwisu.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/76456715640.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/barron_s_sat_subject_test_chemistry_13th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e7e5e23-6425-49f5-9db4-95391e121d60/64808913672.pdfIn PDF document text
    • https://doi.org/10.24843/MIFI.2014.v02.i03.p06In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BA 5624 bytes
SHA-256: 95704c97b9b65a6678dcd51f1c04a74e33643260e208920b238dfedb45f618e6
font_01_sfnt_off0000d9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D3 10172 bytes
SHA-256: a7bdcfcb38ab2d6297f95dd20be306013149871e4718623efd4f5bdc5ed82e3d